2003A&A...398..525V


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.12CET17:12:46

2003A&A...398..525V - Astronomy and Astrophysics, volume 398, 525-539 (2003/2-1)

NGC 4654: Gravitational interaction or ram pressure stripping?

VOLLMER B.

Abstract (from CDS):

The Virgo cluster spiral galaxy NGC 4654 is supposed to be a good candidate for ongoing ram pressure stripping based on its very asymmetric Hi distribution. However, this galaxy also shows an asymmetric stellar distribution. Numerical simulations using ram pressure as the only perturbation can produce a tail structure of the gas content, but cannot account for its kinematical structure. It is shown that a strong edge-on stripping event can produce an asymmetric stellar distribution up to 800Myr after the stripping event, i.e. the galaxy's closest passage to the cluster center. Simulations using a gravitational interaction with the companion galaxy NGC 4639 can account for the asymmetric stellar distribution of NGC 4654, but cannot reproduce the observed extended gas tail. Only a mixed interaction, gravitational and ram pressure, can reproduce all observed properties of NGC 4654. It is concluded that NGC 4654 had a tidal interaction ∼500Myr ago and is continuing to experience ram pressure until the present day.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 4654 - galaxies: interactions - galaxies: ISM - galaxies: kinematics and dynamics

CDS comments: NGC 4645 is a probable misprint for NGC 4654.

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6048 3
2 NGC 4639 GiP 12 42 52.3781396179 +13 15 26.712929286   13.62 12.72     ~ 549 0
3 NGC 4654 GiP 12 43 56.638 +13 07 34.86   11.8       ~ 494 1

    Equat.    Gal    SGal    Ecl

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2019.12.12-17:12:46

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